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Finding the Fourth Proportional to 91,885.76, 126,736.08 and 84,356

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Solution

The fourth proportional to 91,885.76, 126,736.08 and 84,356 is: 116,350.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,885.76 : 126,736.08 = 84,356 : x
  2. Step 2: Convert to fraction form
    91,885.76/126,736.08 = 84,356/x
  3. Step 3: Cross multiply
    91,885.76x = 126,736.08 × 84,356
  4. Step 4: Simplify right side
    91,885.76x = 10,690,948,764.48
  5. Step 5: Solve for x
    x = 10,690,948,764.48/91,885.76
  6. Step 6: Final answer
    x = 116,350.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.